• Google GMail for e-mail, instant messaging and communication (7GB Mail Storage Quota per User)
• Google Calendar for shared event planning, appointments and resource scheduling
• Google Docs for shared folders and documents, as well as Word Processing, Spreadsheets, Presentations and more
• Shared Contacts for all communication services, shared contacts and more
• Google Video for intra-organizational video and file sharing using the YouTube architecture, but keeping all videos secure and protected from the public eye
• Google Sites for publishing web-facing intranet or extranet sites, as well as group shares and portals for information sharing and collaboration

Also available, at a discounted price for Educational Organizations:

• Google Message Security (GMS)/Postini Mail Filtering for eliminating e-mail spam and viruses. Also can be used for compliance routing and filtering to ensure only allowed and authorized mail can be delivered to your users.
• Google Message Discovery (GMD)/Postini Mail Archiving for industry and regulatory compliance. Have 100% of your inbound/outbound mail saved and archived in a non-destructable repository, online, accessible by Administrators only.
• Google Apps Integrated Audiovisual Training Google Apps training empowers users to transition to Google Apps comfortably with a comprehensive knowledge base of short, concise audiovisual clips.

Northwestern University speaks about its experience with Google Apps.